QUESTION 1
The samples are necessarily considered a dependent when
a.  repeated measures are made on the same subjects  
b.  both groups consist of males  
c.  both groups consist of 8th grade pupils  
d.  any of the above is true 
QUESTION 2
Observations are dependent when
a.  the same subjects have been used for both sets of observations  
b.  subjects have been matched on some variable related to the varialbe observed  
c.  either of the above is true  
d.  the mean of X equals the mean of Y 
QUESTION 3
The test between two dependent means requires that one must take special account of
a.  the assumption of normality  
b.  the correlation between the two sets of measures  
c.  the standard deviation of the two variables  
d.  the case of equal sample size 
QUESTION 4
Using paired observations (dependent observations) is most advantageous when
a.  sample size is unequal  
b.  standard deviations must be estimated from samples  
c.  the correlation between the pairs of scores is high  
d.  the correlation between the pairs of scores is low 
QUESTION 5
We wish to test the hypothesis of no difference between the means of the two dependent samples. There are 30 cases in the first sample and 30 cases in the second. The number of degrees of freedom for this test will be
a.  58  
b.  28  
c.  59  
d.  29 
QUESTION 6
We plan to use the directdifference mehtod to test Ho: μ1 μ2 = 0 for a sample of 10 matched pairs. Once the D scores are computed, the procedure is identical to that for testing a hypothesis about
a. 
a single mean 

b. 
the difference between two independent means 

c. 
the difference between two dependent means 

d. 
None of the above 
QUESTION 7
We plan to use the direct difference method for dependent samples to test Ho: µ1 µ2 = 0. The following are the observations for our three matched pairs:
A B
7 4
5 4
4 2
SSD =
a.  2  
b.  14  
c.  6  
d.  8 
QUESTION 8
We plan to use the directdifference method for dependent samples to test HO: µ1 µ2 =0. The following are the observations for our three pairs:
A B
7 4
5 4
4 2
Dbar =
a.  2  
b.  3  
c.  1  
d.  4 
QUESTION 9
We plan to use the directdifference method for dependent samples to test HO: μ1 μ2 =0. The following are the observations for our three pairs:
A B
7 4
5 4
4 2
_{ΣD2 =}
a. 
14 

b. 
9 

c. 
12 

d. 
16 
QUESTION 10
The rule for constructing an interval estimate of μ_{D} is
Xbar ± t_{α}S_{D} 

Dbar ± t_{α}S_{D} 

t_{σ ± DbarS}D 

Dbar ± t_{α}S_{xbar} 
QUESTION 1 The samples are necessarily considered a dependent
when
a. repeated measures are made on the same subjects
QUESTION 2 Observations are dependent when
c. either of the above is true
QUESTION 3 The test between two dependent means requires that
one must take special account of
d. the case of equal sample size
QUESTION 4 Using paired observations (dependent observations) is
most advantageous when
c. the correlation between the pairs of scores is
high
QUESTION 5
Degree of freedom = number of paired values  1 = 30  1 = 29
d. 29
QUESTION 6
a. single mean
QUESTION 7
Difference is (7  4), (5  4), (4  2) = 3, 1, 2
Dbar = [(7  4) + (5  4) + (4  2)] / 3 = 2
SSD = (3  2)^2 + (1  2)^2 + (2  2)^2 = 2
a. 2
QUESTION 8
Dbar = [(7  4) + (5  4) + (4  2)] / 3 = 2
a. 2
QUESTION 9
D^2 = (7  4)^2 + (5  4)^2 + (4  2)^2 = 14
a. 14
QUESTION 10 The rule for constructing an interval estimate of μD
is
Dbar ± tαSD
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